Quadratus (martyr)
In addition to Quadratus of Athens (Quadratus the Apologist), there are several Christian saints with the name Quardatus (sometimes spelled Codratus):
Read more about Quadratus (martyr): Quadratus of Africa, Quadratus of Corinth, Quadratus of Herbipolis, Quadratus of Nicomedia, Quadratus, Theodosius, Emmanuel and Companions